Heres is the other tank and it doesn't appear to have a coating as it claims. It almost looks like the metal has a blasted texture. It's vent tubes are hopefully stainless steel and not a chromed tubing. The vents are brazed and then the exterior surfaces look to simply be painted to cover any discoloration of the metal. The fuel sender opening area is also painted as is the area where the vents exit.

Toms finish.JPGToms tank vents.JPGToms tank brazed vent.JPGToms vents exiting.JPG